FKIE_CVE-2026-9792

Vulnerability from fkie_nvd - Published: 2026-05-28 05:16 - Updated: 2026-10-26 12:10
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Summary
A flaw was found in Keycloak's Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:25097
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:25098
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:30049
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:30050
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-9792Mitigation, Vendor Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2482459Issue Tracking, Vendor Advisory
Impacted products
Vendor Product Version
redhat build_of_keycloak -
To clipboard 

{
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  "configurations": [
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak\u0027s Client Policies, specifically within the `org.keycloak.protocol.oidc` component. When certain condition providers (client-type, client-roles, client-attributes, client-scopes) are used to enforce security restrictions, the `reject-ropc-grant` executor is silently bypassed. This allows an unauthenticated remote attacker to obtain tokens via a Resource Owner Password Credentials (ROPC) grant, even when a policy is explicitly configured to block it. This bypass can lead to unauthorized access and information disclosure."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla en las Pol\u00edticas de Cliente de Keycloak, espec\u00edficamente dentro del componente \u201corg.keycloak.protocol.oidc\u201d. Cuando ciertos proveedores de condiciones (tipo de cliente, roles de cliente, atributos de cliente, \u00e1mbitos de cliente) se utilizan para aplicar restricciones de seguridad, el ejecutor \u201creject-ropc-grant\u201d se omite silenciosamente. Esto permite a un atacante remoto no autenticado obtener tokens a trav\u00e9s de una concesi\u00f3n de Credenciales de Contrase\u00f1a del Propietario del Recurso (ROPC), incluso cuando una pol\u00edtica est\u00e1 configurada expl\u00edcitamente para bloquearla. Esta omisi\u00f3n puede conducir a acceso no autorizado y revelaci\u00f3n de informaci\u00f3n."
    }
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  "id": "CVE-2026-9792",
  "lastModified": "2026-10-26T12:10:00.130",
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
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        "impactScore": 2.5,
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          "role": "CISA Coordinator",
          "timestamp": "2026-05-29T18:32:16.047044Z",
          "version": "2.0.3"
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          "value": "CWE-280"
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      "source": "secalert@redhat.com",
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}



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